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我在学校收到了一个作业，如果指定的话，我想生成随机颜色的输出。My program doesn't generate the color that I would like it to when the RANDOM option is selected.

我对该程序的输入是：

echoc RANDOM|colour string

我的代码看起来像：

    declare -A colours=( 
[black]="0;30" [red]="0;31" [green]="0;32" [yellow]="0;33" [blue]="0;34" [magenta]="0;35" [cyan]="0;36" [white]="0;37"
[BLACK]="1;30" [RED]="1;31" [GREEN]="1;32" [YELLOW]="1;33" [BLUE]="1;34" [MAGENTA]="1;35" [CYAN]="1;36" [WHITE]="1;37")


if [ $# -lt 2 ]; then
  echo "Usage: echoc COLOUR|RANDOM STRING"
  exit 1
fi

regex='^red$|^green$|^yellow$|^blue$|^magenta$|^cyan$|^white|^black$'
shopt -s nocasematch

if [[ $1 =~ $regex ]]; then        
  printf '\033[%sm' ${colours[$1]}
  shift
  printf '%s\033[0m\n' "$*"
  exit 0
elif [[ $1 == "RANDOM" ]]; then   
  printf '\033[%sm' ${colours[$((RANDOM%8+1))]}
  shift
  printf '%s\033[0m\n' "$*"
  exit 3
else
  echo COLOUR must be one of 'red|green|yellow|blue|magenta|cyan|white|RANDOM'
  exit 2
fi
4

1 回答 1

0 
declare -A colours=(

[1]="0;30" [2]="0;31" [3]="0;32" [4]="0;33" [5]="0;34" [6]="0;35" [7]="0;36" [8]="0;37"
[black]="0;30" [red]="0;31" [green]="0;32" [yellow]="0;33" [blue]="0;34" [magenta]="0;35" [cyan]="0;36" [white]="0;37"
[BLACK]="1;30" [RED]="1;31" [GREEN]="1;32" [YELLOW]="1;33" [BLUE]="1;34" [MAGENTA]="1;35" [CYAN]="1;36" [WHITE]="1;37")


if [ $# -lt 2 ]; then

    echo "Usage: echoc COLOUR|RANDOM STRING"

    exit 1

fi


regex='^red$|^green$|^yellow$|^blue$|^magenta$|^cyan$|^white|^black$'

shopt -s nocasematch

if [[ $1 =~ $regex ]]; then

    printf '\033[%sm' ${colours[$1]}

    shift

    printf '%s\033[0m\n' "$*"

    exit 0

elif [[ $1 == "RANDOM" ]]; then

derp=$(($RANDOM%8+1))

    printf '\033[%sm' ${colours["$derp"]}

    shift

    printf '%s\033[0m\n' "$*"

    exit 3

    else

    echo COLOUR must be one of 'red|green|yellow|blue|magenta|cyan|white|RANDOM'

    exit 2

fi
于 2013-11-13T19:32:29.177 回答